Doris is an interactive SQL data warehouse based on MPP architecture, mainly used to solve near real-time reporting and multidimensional analysis. Doris’s efficient import and query are inseparable from the sophisticated design of its storage structure.

This article mainly analyzes the implementation principle of the storage layer of the Doris BE module by reading the code of the Doris BE module, and expounds and decrypts the core technology behind the efficient writing and query capabilities of Doris. It includes Doris column storage design, index design, data read and write process, compaction process, version management of Tablet and Rowset, data backup, and other functions.